Clamping attachment for nailing-machines



R. c. RASMUSSEN. CLAMPING ATTACHMENT FOR NAILING MACHINES.

APPLICATION FILED OCT. 31, I919.

1,392,222, PatentedSept. 27,1921.

Rudqjo/r BRasmussen ATTORMY.

UNITED STATES RUDOLPH c. RAsMUs'sEN, or PHI ADELPHIA, rENNsYLvAnIA.

GLAMPING ATTACHMENT FOR NAILING-MACHINES.

Application filed October 31, 1919. Serial No. 334,647. v

T0 aZZ whom it may concern:

Be it known that I, RUDOLPH C. RAsMUs- SEN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have in vented new and useful Improvements in Clamping Attachments for Nailing-Machines, of which the following is a specification.

This invention relates to nailing machinery and it has more particular reference to machines for nailing boxes, crates and the like.

The main object of thisinvention is to provide a clamping attachment for automatically positioning and holding the parts to be nailed together in proper relation, said clamping attachment operating in advance of the nail drivers.

Another object of this invention is to provide a clamping attachment which can be quickly applied to existing nailing machines without the disconnection or displacement of any of the operative or other parts.

A still further object is to provide a clamping attachment which is simple to con struct, cheap to manufacture and install, and which is not liable to get out of working order.

With these and other objects in view as will be later on more apparent my invention consists essentially in the novel features of construction, combination and arrangement of parts hereinafter fully described and more specifically defined by the appended claim.

In the further disclosure of the invention reference is to be had to the accompanying sheet of explanatory drawings constituting a part of this specification, andin which like characters of reference designate the same or corresponding parts in all the views, and in which Figure 1is a fragmentary front elevation of part of a box nailing machine showing my improved clamping device attached thereto.

Fig. 2--is an enlarged front elevation of the clamping attachment proper with parts broken away or in section to better disclose the underlying structure.

Fig. 3 is an end elevation lOOklIlg' to to the right hand of the preceding figure.

Fig. 4 is a detail perspective view of the clamping member disconnected; and,

Fig. 5- is a fragmentary perspective Specification of Letters Patent.

Patented Sept. 27, 1921.

view of the clamping member operating element.

Referring to the drawings the numeral 10 designates part of the main frame of a box nailing machine upon the front whereof is mounted or formed the box support or table prises a rectangular housing or casing 17 o a closed in on 1ts rear and forward faces by removable plates 18, 18 conveniently held in place by screws 19, and this casing 17, is preferably securely clamped to the end of the frame supporting the cross bars 12, 12, by a Z-shaped strap or bracket 20, and screws 21, an adjustable leg or support 22, including upper and lower sections 23, 24 being provided beneath the casing 17. This adjustable leg or support 22, serves in use to stabilize the attachment and also to make provision for alwayssupporting the same directly upon the table 11., when the latter is raised or lowered to accommodate different depths of boxes and to this end the upper and lower sections 23, 24, are slotted at 25, to receive bolts 26, whereby said parts are rigidly clamped together in adjusted relation.

Slidably mounted in the aforesaid housing 17 is a block 27 provided atone of its upper sides with an inclined part 28 with which is adapted to cooperate a similarly inclined end 29, of a plunger member 30, provided with an upwardly extending portion or rod 31, adapted for adjustable connection by means of lock nuts 32, to the nail driving head 16. It is to be here noted that the plunger member 30 is shown as rectangular in cross section and that it operates through a correspondingly shaped aperture 33, in the crown of the housing 17, but itwill be readily understood that any other appropriate section may be employed provided it is arranged to have an axial movement longitudinally only.

Projecting laterally from the aforesaid block 27, is a rod 34, provided at its outer end with a head 35, and said rod 34, and

block 27 are normally projected to the right hand in Fig. 2, by a compression spring 36, the latter in turn being housed in a recess 37, about the inner end of the rod; and said spring abutting against the side wall ofthe casing 17, a hole 38, being provided for the passage of the rod 34 through the side wall.

In some instances I may employ a steadying bearing or hanger guide 39, adapted for fixture where desired on the aforesaid cross bars 12, 12 by a screw 40, but in most instances I find this bearing or guide unnecessary.

In use and assuming that a box .i1,-Fig. 1',has been placed upon the table 11 to have the bottom or top 42, nailed there to said box is placed against the guide 43 and moved rearwardly to the requisite position with the top or bottom to be nailed thereon, whereupon the operator trips the machine in the well known way, which causes the driving head 16, to commence to descend, which in turn through the connected rod 31, projects the block 27, toward the left hand in Fig; 2. This movement of the block 27 moves the head 35, against the right hand edge of the box bottom or top 42 in'advance of the nailing operation and in sures said bottom or topbeing properly alined relative to the sides or ends of the box prior to the actual nailing. On the re While I have shown and described one practical and the preferred embodiment of my invention I wish it clearly understood that slight' changes may be made in the form, disposition and combination of the several parts to accommodate my invention to different types of nailing machines, and it is desired to protect all such changes and other arrangements as may reasonably be construed as falling within the scope of the appended claim.

Having described my invention, what I claim as new anddesire to secure by Letters Patent, is

A clamping attachment for nailing machines comprising a rectangular casing equipped for attachment to a stationary part of the machine, a slidable block in said housing and having an inclined face, said slidable block having anelement extending through a wallof the casing and being adapted for movement in opposition to compression means for clamping the part to be nailedinproperposition, the said compression means interposed between the block and said wall of the casing and a depending plunger adapted to be attached to and carried by the driving head and having an inclinedportion at its lower part for co- "operation with theaforesaid inclined face of the movable memberto actuate the latter in advance of an actual nailing operation.

In testimony whereof I affix my signature.

RUDOLPH C. RASMUSSEN. 

